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• • UNDERGROUND <br />ENGINEERING Sc <br />ENVIRONM1IENTAL <br />SOLUTIONS <br />1 <br /> <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br />1 <br />L <br />31 January 2000 <br />File No. 20200-002 <br />CAMAS Colorado, Inc. <br />3605 South Teller Street <br />Lakewood, Colorado 80235 <br />Attention: Mr. Curtt L. Coppage <br />Subject: Geotechnical Addendum - 1998 Annual Report <br />Morrison Quarry <br />Morrison, Colorado <br />Dear Curtt: <br />Halev ~ .aldrich. Inc. <br />l10 IGth Street <br />Suite 900 <br />Denser, CO SO'_01-5202 <br />TeI::i03.53~1.1100 <br />Fax: 303.53-t.1: T; <br />Email: DEN©Hale~~Ald nch.com <br />Haley & Aldrich, Inc. has completed the Geotechnical Addendum for the 1998 Notice of <br />Intent to Continue Mining Operations/Annual Report for the Morrison Quarry. The <br />Addendum is being submitted under separate cover by Haley & Aldrich to the Colorado <br />Division of Minerals and Geology (DMG) to supplement the annual fee filing and Annual <br />Report form submittal made by CAMAS on OS January 1998. <br />The Geotechnical Addendum was prepared in accordance with the Observational Approach <br />presented in CAMAS' Mine Plan Amendments Nos. 3 and 4. Work included general <br />OFFICES observations of highwall and slope conditions at the Morrison Quarry, geologic mapping of <br />6oslon exposed rock faces at two final cut slopes established during the reporting year, and <br />Mass~tdii+;crr; comparison of observed conditions with baseline conditions assumed during design. <br />CIe1•eland <br />olii<~ It has been our pleasure to continue working with you and with Morrison Quarry personnel to <br />Har~iord provide ongoing geotechnical stability evaluations and mine plan modifications. Please call <br />Cun.Ja•crrcar me if you have any questions, or if Haley & Aldrich can be of any additional assistance. <br />Los Angeles <br />Gdi~urnia <br />Blanchester <br />Nra Hnuipslurt <br />Nea•ro rk <br />Nrs+ Jrrsru <br />Portland <br />14ai. ri <br />Roc:Jester <br />Nru'lurk <br />San Diego <br />Grlilin"uia <br />San Franci>cu <br />Cal it nn ua <br />lVos 1in~tun <br />DiSh~ii . of G\I mnbm <br />Sincerely yours, <br />HALEY & ALDRICH, INC. <br /> <br />~' l~' ~( 1 ~-~ <br />Jay C. Davenport, E.I. <br />Engineer <br />Attachments <br />Cc: Mike Refer. File <br />Kent A. Pease, P.E. <br />Senior Engineer <br />O:\PROJECTS\i0'00 Afornwn ljuarry\pp.\Amual Repon Oro~eckni<aJ AJEeMum\I998\98ry~ markup Eoc <br />